World War 2 was a war fought from 1939 to 1945 in Europe.The war in Europe began in 1939 with the invasion of Poland by Nazi Germany. America doesn't join the war for many reasons until 1941 after getting hit at pearl harbor. Concluded in 1945, with the official surrender of the axis powers. It was the largest armed conflict in history, spanning the entire world and involving more countries than any other war, as well as introducing new powerful weapons, also including the first use of nuclear weapons.
